A206896 Number of nX4 0..3 arrays avoiding the pattern z-2 z-1 z in any row, column or nw-to-se diagonal

241, 58081, 11745962, 2408811358, 491471001691, 100388008195387, 20501676381643219, 4187168666551506836, 855161142688231935007, 174653143197806276287106, 35670128759740127202030518

Offset

1,1

Comments

Column 4 of A206900

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

Some solutions for n=4
..1..0..2..1....1..3..2..1....3..2..2..1....1..0..3..2....3..1..1..2
..0..1..0..2....1..1..0..3....1..2..2..0....1..1..0..0....0..1..0..0
..2..1..0..0....2..3..3..0....1..3..1..3....3..1..3..0....0..0..3..0
..1..0..1..0....0..2..1..3....1..0..3..3....1..0..1..3....1..1..2..0

Crossrefs

Sequence in context: A001361 A206842 A206834 * A207286 A217998 A183891

Adjacent sequences: A206893 A206894 A206895 * A206897 A206898 A206899

Keyword

nonn

Author

R. H. Hardin Feb 13 2012

Status

approved